著者:
Heidi A. Keen 1Washington State University, Pullman, WA, 99164, USA

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O. Lynne Nelson 1Washington State University, Pullman, WA, 99164, USA

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Charles T. Robbins 1Washington State University, Pullman, WA, 99164, USA

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Marc Evans 1Washington State University, Pullman, WA, 99164, USA

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David J. Shepherdson 2The Oregon Zoo, Portland, OR, 97221, USA

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Ruth C. Newberry 3Norwegian University of Life Sciences, Department of Animal and Aquacultural Sciences, P.O. Box 5003, 1432 Ås, Norway; ruth.newberry@nmbu.no

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